NHTSA Complaint #10171652 — 2003 CHEVROLET SILVERADO 1500 HD

MY SPEEDOMETER IS MALFUNCTIONING. THIS WAS FIRST POINTED OUT BY AN IDAHO STATE TROOPER WHEN I WAS PULLED OVER WITH MY FAMILY IN THE TRUCK PULLING A TRAILER. MY SPEEDOMETER READ 60 BUT I WAS CLOCKED AT 79 MPH. THIS LAST WEEKEND ON A TRIP TO DOWN I-5 IN CALIFORNIA, I WAS DOING WHAT THOUGHT WAS 70 MPH BUT I WAS PASSING A LOT OF CARS AND WHEN I REMEMBER THE ISSUE MY TACHOMETER READ 3500 RPM WHICH MEANS I WAS DOING 80 PLUS. THEN YESTERDAY (10/22/2006) MY SPEEDOMETER READ 10 MPH WHEN MY TACH INDICATED 2100 RPM (~62 MPH), WHICH WAS CONFIRM BY BY WIFE FOLLOWING IN ANOTHER VEHICLE. THE PROBLEM IS INCONSISTENT. THE SPEEDOMETER SEEMS TO WORK FOR A WHILE BUT THEN DEGRADES AND THE SPEED INDICATED DOES NOR REFLECT THE ACTUAL SPEED. BETWEEN THE INITIAL OCCURRENCE AND 10/20 I DID NOT MAKE ANY TRIPS LONGER THAN 20 MINUTES AND DID NOT NOTICE A PROBLEM EXCEPT FOR A SOMEWHAT JERKY SPEEDOMETER NEEDLE. THE SPEEDOMETER SEEMS TO "RESET" AFTER THE VEHICLE STOP FOR A WHILE. ESTIMATED COST OF REPAIR IS $98-$105 "EVALUATION AND $550-$600 ACTUAL REPAIR WHICH INCLUDES PARTS AND LABOR. *NM